So, in other words, Windows 10 will now become a computer hog when updating. Am I correct?
I don't know about it becoming a "hog", but it does become a "server" for the Windows Update downloads -- transferring them from your computer to other computers. And it becomes a client of other similar computers that have been turned into ersatz "servers".
If all the computers are on the same local network (LAN), this has implications in network bandwidth (depending on how your switches are configured), disk bandwidth, and CPU usage.
If your computer is transferring the updates to computers out on the internet (that's the default), this has implications on your internet connection usage (billing), especially if you're charged per GB and/or have a "cap" of only so many GB per month.
If your computer is on the --receiving-- end of an internet transfer of updates, in addition to the usage/billing, there are security implications since you're basically downloading content that will execute with administrative privilege and install directly into your computer's operating system. I'm sure there are checksums and so forth that presumably would stop content that has been tampered with, --BUT-- by the time that check happens, it's already on your computer.
All in all, I think this is a bad idea. The opportunities for trouble are manifest.